Probably none of them are Trojans - heuristics are rather error prone as they're looking at program behaviour and characteristics, not a specific program signature.
As Milo says the first two are probably HP related and the third is probably an AOL program.
From Bleeping Computer:
hphmon05.exe: Hp Printer monitor that detects with flash cards are inserted into the printer and automatically starts HP Photosmart.
hpsysdrv.exe: This item keeps track of how many times the system has been recovered and the times of the first and last recoveries done on the system. Leaving unchecked will sometimes prevent the Keyboard Manager program from detecting that the computer is an HP. Since this program/driver was only made to run on HP, if it can't tell that it is an HP it will not run. If unchecked, it can prevent the running of the Application Recovery CDs, the use of the multimedia keys, and the HP Instant Support. Also seen that without it running, the Riptide Sound card that was installed on some older HP computers stops working
WanMPSvc.exe: An AOL component, the Wan miniport (ATW) service. If you delete this and logon, AOL reports a problem with your internet connection, and reinstalling AOL doesn’t help
I'd suggest uploading the three files in question to a service such as Virus Total that scans with multiple virus scanners:
https://www.virustotal.com/